Facebook advertising refers to the process of creating and running paid advertising campaigns on the Facebook platform. Facebook provides businesses and advertisers with a powerful advertising platform that allows them to reach their target audience based on various demographics, interests, behaviors, and location.

Facebook advertising offers a range of ad formats, including image ads, video ads, carousel ads, and more, that can be displayed in users' news feeds, in the right column of the desktop version, or within Facebook's Audience Network, which extends ads to partner websites and mobile apps. Advertisers can set specific campaign objectives, such as increasing brand awareness, driving website traffic, generating leads, or promoting specific products or services.

Facebook's robust targeting capabilities, advanced analytics, and audience insights allow advertisers to refine their targeting, optimize their campaigns, and track their ad performance, ultimately maximizing their return on investment (ROI) and achieving their marketing goals.

Google PPC (Pay-Per-Click) refers to a form of online advertising provided by Google through its advertising platform, Google Ads. With Google PPC, advertisers bid on keywords relevant to their products or services, and their ads appear at the top or bottom of Google search results and on partner websites within the Google Display Network. Advertisers are charged only when a user clicks on their ad, hence the term "pay-per-click."

The ads are displayed to users who are actively searching for related information, making Google PPC a highly targeted advertising method. Advertisers can set budgets, create compelling ad copy, and target specific locations and demographics. Google PPC offers a flexible and measurable advertising solution, allowing businesses to drive targeted traffic, increase brand visibility, and achieve specific marketing goals while maintaining control over their advertising costs.

Domain authority (DA) and PageRank authority (PR) are two metrics used to measure the credibility and influence of a website in the online domain.

Domain Authority (DA): Domain authority is a metric developed by Moz that predicts how well a website will rank in search engine results. It is calculated based on various factors such as the quality and quantity of backlinks pointing to the website, the overall trustworthiness of the domain, and other SEO-related factors. Domain authority is measured on a scale from 1 to 100, with higher scores indicating a higher likelihood of ranking well in search engine results.

PageRank Authority (PR): PageRank authority is a metric developed by Google that measures the importance and relevance of a specific webpage based on the quantity and quality of backlinks it receives from other webpages. PageRank authority is determined by an algorithm that assigns a numerical value from 0 to 10 to each webpage. Higher PageRank authority indicates greater credibility and influence.

It's important to note that PageRank, as a specific metric, has not been publicly updated by Google since 2013. However, the concept of evaluating the authority and influence of webpages based on backlinks remains relevant in the realm of search engine optimization (SEO).

Both domain authority and PageRank authority are used as reference points to assess the relative strength and credibility of a website or webpage. However, they are not the sole determinants of search engine rankings, and search engines use a multitude of factors to determine the position of webpages in search results.